Convoy L21A SST40 CW (2019) review

Luminus SST40 CW LED
2300 lm output
129600 cd intensity
1 x 21700 Li-Ion battery

The Convoy L21A SST40 CW (L21ASST40CW) released in 2019. It uses Luminus SST40 CW LED, SMO reflector and 1 x 21700 Li-Ion battery. The powerful emitter in this flashlight provides up to 2300 lm output, 129600 cd intensity, and a beam distance of 720 m.

This light has 4 modes of lighting. The memory function is a nice feature, the light will remember the last used mode.

Table of contents:

Convoy L21A SST40 CW (L21ASST40CW) specifications

NameL21A SST40 CW
Rated 4/5 based on 1051 user votes.


The aluminium body of flashlight treated with a Type III hard-anodized, anti-abrasive finish.

Weight360 g
Length169 mm
Head diameter64.5 mm
Materialaluminium alloy with HAIII hard-anodized finish


The emitter of L21A SST40 CW manufactured by Luminus, a US-based LED manufacturer. The L21A SST40 CW has a smooth reflector. The properly focused smooth reflector gives you a more cohesive hotspot and therefore throws better. It has an AR coated lens.

EmitterLuminus SST40 CW LED
Color temperature6500 K
LensAR coated glass
Switchmechanical rear, forward clicky


The throw is the calculated distance in meters at which the flashlight produces a light intensity of 0.25 lux. The candela per lumen (cd/lm) ratio can be used to determine if a flashlight has a spot or flood type beam. Well-focused spot beams can be over 100 cd/lm, tactical flashlights are typically between 20-100 cd/lm, and work lights are less than 10 cd/lm.

Flux2300 lm
Intensity129600 cd
Throw720 m
CD/LM factor56.35


The L21A SST40 CW has mode memory. Mode memory means that the light will remember the mode you were using when the light was last turned off, and when you turn it on again.

Modes4 modes
Mode memoryyes
Ramping modeno


The L21A SST40 CW cannot charge batteries directly. You may need an external charger to keep your battery going. This flashlight has a built-in low voltage protection (LVP) to prevent damage to the cell from over-discharge, so protected cells are not necessary. The built-in thermal control automatically adjusts brightness output to prevent overheating.

Battery1 x 21700 Li-Ion battery
Battery indicatorno
Charger portno
Thermal regulationyes

The performance of the Convoy L21A SST40 CW flashlight is measured according to the ANSI / NEMA FL1 Standard 30 seconds after switching the light on. The ANSI/NEMA FL1 2009 Standard is a set of flashlight performance guidelines.

The specifications above are based on the official data published by the manufacturer, but we also take user reviews into consideration. If you found an error or something lacking in the specifications above for the Convoy L21A SST40 CW, then don’t hesite and signal the problem to us.

Convoy L21A SST40 CW (L21ASST40CW) pictures

Convoy L21A SST40 CW / L21ASST40CW photo Convoy L21A SST40 CW / L21ASST40CW photo Convoy L21A SST40 CW / L21ASST40CW photo Convoy L21A SST40 CW / L21ASST40CW photo
Convoy L21A SST40 CW / L21ASST40CW

Convoy L21A SST40 CW (L21ASST40CW) comparisons

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Convoy L21A SST40 CW

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